PORTLAND, Maine (NEWS CENTER) — The biggest supermoon since 1948 will be in the sky Sunday night which will be followed later this week by unusually high tides.

At just before 9 a.m. Monday morning, this supermoon will be the biggest it’s been in about 70 years.

John Cannon, a senior meteorologist at the National Weather Service in Gray, said the tides in Portland will reach flood stage without a storm that would normally accompany them push them up that far.

It could get to the point where there’s minor street flooding in the city and perhaps places like Biddeford and Bath.

Since there isn’t a storm occurring simultaneously, researchers like Cannon plan to study the tides when they arrive.

The NWS is partnering with local schools and other groups to monitor the tides so Portland's tide gauge can be used to predict future storm impact.

“This is a relatively safe way to go out and take measurements and help us refine and tune,” Cannon said.

So great, we'll be able to predict the weather better. But could we use the supermoon to predict something even more important, like say, the future?

Jewels Miller, who has been a psychic reader for more than 20 years, said supermoons may not change the future but do affect people's energy.

“I have noticed that it does phase people's energy and it does create, sometimes, good change and sometimes bad change,” she said.

Miller said a woman who was once a client of hers actually called off her engagement telling her the moon gave her a bad feeling.

“She was convinced it was not the right thing to do for her,” Miller said. “That moon phase did reflect that channel.”

Later, that woman reconsidered and got married after the moon passed.

The supermoon will peak Monday morning, but the highest tides will actually be around 11 a.m. Tuesday.

The next moon that will appear this large will be in 2034.